style(lib): use just std instead of ::std in paths (#2101)

tests/client.rs

@@ -21,7 +21,7 @@ use tokio::net::TcpStream;
 use tokio::runtime::Runtime;
 
 fn s(buf: &[u8]) -> &str {
-    ::std::str::from_utf8(buf).expect("from_utf8")
+    std::str::from_utf8(buf).expect("from_utf8")
 }
 
 fn tcp_connect(addr: &SocketAddr) -> impl Future<Output = std::io::Result<TcpStream>> {
@@ -2503,7 +2503,7 @@ trait FutureHyperExt: TryFuture {
 impl<F> FutureHyperExt for F
 where
     F: TryFuture + 'static,
-    F::Error: ::std::fmt::Debug,
+    F::Error: std::fmt::Debug,
 {
     fn expect(self, msg: &'static str) -> Pin<Box<dyn Future<Output = Self::Ok>>> {
         Box::pin(

tests/server.rs

@@ -2157,7 +2157,7 @@ impl ServeOptions {
 }
 
 fn s(buf: &[u8]) -> &str {
-    ::std::str::from_utf8(buf).unwrap()
+    std::str::from_utf8(buf).unwrap()
 }
 
 fn has_header(msg: &str, name: &str) -> bool {

tests/support/mod.rs

@@ -208,12 +208,12 @@ macro_rules! __internal_headers_map {
 
 macro_rules! __internal_headers_eq {
     (@pat $name: expr, $pat:pat) => {
-        ::std::sync::Arc::new(move |__hdrs: &hyper::HeaderMap| {
+        std::sync::Arc::new(move |__hdrs: &hyper::HeaderMap| {
             match __hdrs.get($name) {
                 $pat => (),
                 other => panic!("headers[{}] was not {}: {:?}", stringify!($name), stringify!($pat), other),
             }
-        }) as ::std::sync::Arc<dyn Fn(&hyper::HeaderMap) + Send + Sync>
+        }) as std::sync::Arc<dyn Fn(&hyper::HeaderMap) + Send + Sync>
     };
     (@val $name: expr, NONE) => {
         __internal_headers_eq!(@pat $name, None);
@@ -223,13 +223,13 @@ macro_rules! __internal_headers_eq {
     };
     (@val $name: expr, $val:expr) => ({
         let __val = Option::from($val);
-        ::std::sync::Arc::new(move |__hdrs: &hyper::HeaderMap| {
+        std::sync::Arc::new(move |__hdrs: &hyper::HeaderMap| {
             if let Some(ref val) = __val {
                 assert_eq!(__hdrs.get($name).expect(stringify!($name)), val.to_string().as_str(), stringify!($name));
             } else {
                 assert_eq!(__hdrs.get($name), None, stringify!($name));
             }
-        }) as ::std::sync::Arc<dyn Fn(&hyper::HeaderMap) + Send + Sync>
+        }) as std::sync::Arc<dyn Fn(&hyper::HeaderMap) + Send + Sync>
     });
     ($headers:ident, { $($name:expr => $val:tt,)* }) => {
         $(